The 24-year-old singer and budding fashion designer brought her typical sexy outfit A-game to hot Hollywood spot Eden on Thursday night. (At the same time, presciently, Taylor Swift and Jennifer Lopez were wearing especially revealing dresses. Did they have a three-way call where they planned this?)
Rihanna's long-sleeved frock may have had sub-elbow sleeves, but that's about all that was modest about it, as the fabric revealed her skimpy black underwear and totally-not-even-there bra.
Not that we're surprised to see a sheer dress from the person who posts topless photos on her Instagram on the regs and goes out in New York wearing only a lacy sheer bra. Hey, we suppose nipple rings DO go with everything.
Want more? Be sure to check out HuffPost Style on Twitter, Facebook, Tumblr, Pinterest and Instagram at @HuffPostStyle.
Do you have a style story idea or tip? Email us at firstname.lastname@example.org. (PR pitches sent to this address will be ignored.)
HuffPost Entertainment is your one-stop shop for celebrity news, hilarious late-night bits, industry and awards coverage and more — sent right to your inbox six days a week. Learn more